How to properly call FirebaseFirestore.instance.clearPersistence() in Flutter?

Question

I'm facing the same problem as this guy question

But his accepted answer didn't helped me.

The problem:

When an user signs out, and another different user signs in, all data shown on my app is from the previous signed out user due to firebase caching system. I searched about this issue and found a solution that consists in calling this method:

FirebaseFirestore.instance.clearPersistence();

But everytime and everywhere I place this line of code, throws an exception saying I cannot call this method when the client is running:

Exception has occurred. PlatformException (PlatformException(failed-precondition, Operation was rejected because the system is not in a state required for the operation's execution. If performing a query, ensure it has been indexed via the Firebase console., {code: failed-precondition, message: Operation was rejected because the system is not in a state required for the operation's execution. If performing a query, ensure it has been indexed via the Firebase console., nativeErrorMessage: Persistence cannot be cleared while the client is running., nativeErrorCode: 9}))

so, how to call this method? or better, is there a best way to solve this problem?

Answer 1

It seems it's necessary to terminate the FirebaseFirestore.instance first.

At the end of my log off method I call:

await FirebaseFirestore.instance.terminate();
await FirebaseFirestore.instance.clearPersistence();

I get no errors thrown and everything seems to be working as it should now.

Answer 2

You should call it immediately after you initialize Firebase, and before you make the first query.